FS: Built stroker m20 motor
-2.7l eta block, bored to 84.5mm, then final bore and honing done after pistons were received for the tightest fitment. Hotanked.
-New OEM rod and main bearings
-s50 crank and rods
-JE forged pistons with heavy duty wrist pins 8.5:1 CR, 84.5mm bore, new JE rings.
-"885" rebuilt head by Spokane cylinder head service, resurfaced to RA50
-MLS .140 HG
-rotating assembly balanced and blueprinted
With a bore of 84.5 and stroke of 86mm final displacement is 2.9L(2.897) with a final CR of 8.5:1.
All parts inspected and machined by O'Neil's custom engines in spokane. Meant to handle 400+whp. s50 rods weigh 555g which is about 150g lighter than a stock eta rod, and in the range of most aftermarket H-beam rods. Gotta love the engineers at BMW.
I spent A LOT of time researching to build this stroker turbo motor. Many talks with Steve at TopEnd Racing and the e30tech gurus. I've invested about $3.5k in parts and machining alone.
I'll let it go for $2500. Bottom end is assembled. Co-assembled by JJ(ASNW autocrossers will know him) and myself. Pics to come soon. I am not opposed to parting it out. The only thing it's missing right now are its ARP headstuds, new ones are on the way!
-2.7l eta block, bored to 84.5mm, then final bore and honing done after pistons were received for the tightest fitment. Hotanked.
-New OEM rod and main bearings
-s50 crank and rods
-JE forged pistons with heavy duty wrist pins 8.5:1 CR, 84.5mm bore, new JE rings.
-"885" rebuilt head by Spokane cylinder head service, resurfaced to RA50
-MLS .140 HG
-rotating assembly balanced and blueprinted
With a bore of 84.5 and stroke of 86mm final displacement is 2.9L(2.897) with a final CR of 8.5:1.
All parts inspected and machined by O'Neil's custom engines in spokane. Meant to handle 400+whp. s50 rods weigh 555g which is about 150g lighter than a stock eta rod, and in the range of most aftermarket H-beam rods. Gotta love the engineers at BMW.
I spent A LOT of time researching to build this stroker turbo motor. Many talks with Steve at TopEnd Racing and the e30tech gurus. I've invested about $3.5k in parts and machining alone.
I'll let it go for $2500. Bottom end is assembled. Co-assembled by JJ(ASNW autocrossers will know him) and myself. Pics to come soon. I am not opposed to parting it out. The only thing it's missing right now are its ARP headstuds, new ones are on the way!
Comment